feat(ops): 添加生产监控告警基线

- 新增 Prometheus/Grafana/Loki/Promtail 监控 profile\n- 覆盖 DB、磁盘、慢 API、慢 Prisma、任务失败和小宝摘要 stale 告警\n- 补充 postgres-exporter 自定义查询、Dashboard、部署文档和校验\n\nCo-Authored-By: GPT-5 Codex <codex@openai.com>

deploy/monitoring/promtail/config.yml

@@ -0,0 +1,53 @@
+server:
+  http_listen_port: 9080
+  grpc_listen_port: 0
+
+positions:
+  filename: /tmp/positions.yml
+
+clients:
+  - url: http://loki:3100/loki/api/v1/push
+
+scrape_configs:
+  - job_name: docker
+    docker_sd_configs:
+      - host: unix:///var/run/docker.sock
+        refresh_interval: 15s
+    relabel_configs:
+      - source_labels: ['__meta_docker_container_name']
+        regex: '/(.*)'
+        target_label: container
+      - source_labels: ['__meta_docker_container_label_com_docker_compose_service']
+        target_label: compose_service
+      - source_labels: ['__meta_docker_container_label_com_docker_compose_project']
+        target_label: compose_project
+    pipeline_stages:
+      - docker: {}
+      - match:
+          selector: '{compose_service="server"} |= "Slow API request"'
+          stages:
+            - metrics:
+                ftb_slow_api_log_total:
+                  type: Counter
+                  description: Slow API request log entries emitted by the NestJS server.
+                  config:
+                    action: inc
+      - match:
+          selector: '{compose_service="server"} |= "Slow Prisma query"'
+          stages:
+            - metrics:
+                ftb_slow_prisma_log_total:
+                  type: Counter
+                  description: Slow Prisma query log entries emitted by the NestJS server.
+                  config:
+                    action: inc
+      - match:
+          selector: '{compose_service="server"} |~ "AppData relation sync failed|AI 调用失败|AI 风险解读调用失败"'
+          stages:
+            - metrics:
+                ftb_job_failure_log_total:
+                  type: Counter
+                  description: Compatibility sync, AI job, or background task failure logs.
+                  config:
+                    action: inc
+